a{
  display: block;/*絨�a��������*/
  width: 200px;/*莅丞舟����絎遵墾*/
  height: 100px;/*莅丞舟�����水墾*/
  font-family: Microsoft Yahei;
  line-height: 100px;/*莅丞舟絖�篏�����筝㊦��蕭�綺�*/
  background-color: #2f6f6f;
  margin: 0px 0px;/*������蕭�絎初��菴�margin莅丞舟*/
  color: #fff;
  text-align: center;/*絖�篏�絮�筝�*/
  text-decoration: none;/*�紙�筝���膾�*/
  font-size: 30px;
}